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What is the maximum tire size for a 94 4runner that is at stock ride height? I remember reading somewhere that the max size without any rubbing is around 32-33 inches, is this true? I am currently running 31X10.50's and would like to get some bigger tires, but I don't have the funds to lift my truck so......

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2. What is the largest tire I can fit under my stock 4Runner?
For 1st and 2nd gen 4Runners and trucks you can safely fit 32x11.5s with little or no rubbing. For 3rd gens you can fit 265/75 R16.

However, tire size varies by manufacturer so some may rub a little more than others. Mud tires tend to vary more than street or A/T tires so they may rub even more. Also, 2 hidden concerns with going bigger are the speedometer offset and the possible loss in power. The loss in power is the result of the change in the effective gearing by going to a bigger tire. The severity of the power loss is dependant on your present gearing and how large a tire you moved up to. To remedy the loss of power you should change your gears in your differential(s).

Having said that, usually if the tires are only enlarged 1 inch most people just live with the loss of power and speedometer error. Most 3rd gens don't feel the loss of power because the engine is more powerful.

A guy on here ran 35x10.50 with no lift, and he claimed no rubbing, but the pictures sure looked like he rubbed A LOT.

I have fit 34x9.50 TSL's (same diameter as most 35's) with no lift, but they definitely rubbed, even after pinchweld beating and some minor trimming. Different offset rims might have cleared it, a 1" body lift would have definitely cleared it.

No loss of power with taller tires, what you lose is torque to the road, assuming gearing not changed. Loss = new-tire-diameter/original-tire-diameter, so with say a 31" tire, you lose about 10% torque and the engine revs drop about 10% over stock.

Yep, more shifting or shifting sooner, slower acceleration and probably lower MPG since the engine is working harder. Your speedometer and odometer will also read slower than normal. Would be about like the difference between 4th and 5th gear on a manual tranny.

If you dont have money for a lift and regearing are you really wanting to spend more money at the pump? You will feel a difference, in take off and in your wallet, if you go to a 33 without regearing. Just some food for though...

No loss of power with taller tires, what you lose is torque to the road, assuming gearing not changed. Loss = new-tire-diameter/original-tire-diameter, so with say a 31" tire, you lose about 10% torque and the engine revs drop about 10% over stock.

I think 4crawler means no loss of power from the engine/technical point of view, FredTJ is referring to "at the wheels" or butt dyno.

TECHNICALLY, the engine is still putting out the same power/torque, but with the higher effective gear ratio, you see less torque at the ground, which is technically less power (since power basically is torque * RPM)

I think 4crawler means no loss of power from the engine/technical point of view, FredTJ is referring to "at the wheels" or butt dyno.

TECHNICALLY, the engine is still putting out the same power/torque, but with the higher effective gear ratio, you see less torque at the ground, which is technically less power (since power basically is torque * RPM)

Less "power" at the ground IS less torque at the ground, no technically about it

You have less torque to the ground but more speed, as bigger tires will make you go faster for the same RPM, given everything else is the same.

Speed really has nothing to do, directly, with torque or HP

However I could argue that, given your statement above, that you will not have more speed, as you won't have enough torque (HP, whatever) at the ground to get your up to redline in top gear
This is actually a pretty common "complaint" from those who go up to bigger tires and don't re-gear.
"Geee, I can no longer even use 5th gear"

Power is a function of force and speed, or work per unit time. So if you have 10% less force (torque) but 10% more speed you get the same power as before. Assuming there is enough torque margin in the engine to handle the larger tires, at a given engine RPM the ground speed will be faster with a taller tire than with a shorter tire given the same gearing. And I do know that aerodynamic drag and frictional forces do increase with speed.

Agreed, if you are at the max torque output of the engine and you try to add 10% load, it will slow down (or at least not speed up). And if you are right at the bottom of flat part of the torque curve, slowing down the engine speed will cause a loss in torque that it can put out. It is usually torque that folks "feel" as (horse)power as it is torque that causes the vehicle to accelerate. And as Carrol Shelby used to say "horsepower sells cars but torque wins races".

But if you have an engine that puts out 100 HP and you change the size of the tires, the engine will still put out 100 HP, that power does not vanish. And if you chage the gearing to match the change in tire size, you should get the same speed and acceleration as before, neglecting the increased rotational inertia of the heavier tires.

If this were not the case, if I put say 14" tires on my 4Runner instead of 28" stockers, I would now have twice the engine power or 232 HP instead of 116, and if I went to 7" wheels (yes ridiculous size) and I would double my power again up to 464 HP.